Submission #831748

#	Time	Username	Problem	Language	Result	Execution time	Memory
831748		Chal1shkan	Grudanje (COCI19_grudanje)	C++14	70 / 70	133 ms	25204 KiB

grudanje

//Bismillahir-Rahmanir-Rahim
 
# include <bits/stdc++.h>
 
# define pb push_back
# define ff first
# define ss second
# define nl "\n"
# define sz(x) ((int)(x).size())
# define all(x) (x).begin(), (x).end()
# define deb(x) cerr << #x  << " = " << x << endl; 
# define pll pair <ll, ll>
# define pii pair <int, int>
 
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
 
const ll maxn = 1e5 + 7;
const ll inf = 2e18 + 0;
const ll mod = 1e9 + 7;
const ll dx[] = {-1, 1, 0, 0};
const ll dy[] = {0, 0, -1, 1};
 
using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

ll n, q, p[maxn];
string s;
ll tl[maxn], tr[maxn];
ll pref[maxn][26];
 
bool ok (ll mid) {
	memset(pref, 0, sizeof pref);
	string str = s;
	for (ll i = 1; i <= mid; ++i) {
		str[p[i]] = '*';
	}
	for (ll i = 1; i <= n; ++i) {
		for (ll j = 0; j < 26; ++j) {
			pref[i][j] = pref[i - 1][j];
		}
		if (str[i] != '*') {
			pref[i][(str[i] - 'a')]++;
		}
	}
	bool ok = 1;
	for (ll i = 1; i <= q && ok; ++i) {
		for (ll j = 0; j < 26 && ok; ++j) {
			if (pref[tr[i]][j] - pref[tl[i] - 1][j] > 1) {
				ok = 0;
			}
		}
	}
	return ok;
} 

void ma1n (/* SABR */) {
	cin >> s;
	n = sz(s);
	s = ' ' + s;
	cin >> q;
	for (ll i = 1; i <= q; ++i) {
		cin >> tl[i] >> tr[i];
	}
	for (ll i = 1; i <= n; ++i) {
		cin >> p[i];
	}
	ll l = 0, r = n - 1, ans = n;
	while (l <= r) {
		ll mid = (l + r) >> 1;
		if (ok(mid)) {
			r = mid - 1;
			ans = mid;
		}
		else {
			l = mid + 1;
		}
	}
	cout << ans << nl;
}
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
//  freopen("file.in", "r", stdin);
//  freopen("file.out", "w", stdout);
    int ttt = 1;
//  cin >> ttt;
    for (int test = 1; test <= ttt; ++test) {
//      cout << "Case " << test << ":" << '\n';
        ma1n();
    }
    return 0;
}
 
// 998batrr | BbIWEJI 3A TObOU!!!
// tourist  | BbIWEJI 3A TObOU!!!

• Subtask 1: 7 / 7
• Subtask 2: 7 / 7
• Subtask 3: 7 / 7
• Subtask 4: 7 / 7
• Subtask 5: 7 / 7
• Subtask 6: 7 / 7
• Subtask 7: 7 / 7
• Subtask 8: 7 / 7
• Subtask 9: 7 / 7
• Subtask 10: 7 / 7